android: remove hard code 4kb page size for arm devices

[tasunnn]

Bug: 527944046

[github-actions]

🤖 Gemini Suggested Commit Message

---

android: Enable dynamic page size for all Android CPUs

Enable dynamic page size lookup for all Android architectures in the
partition allocator. 32-bit Android was previously hardcoded to a 4KB
page size.

32-bit Android userspace may run on 64-bit Android kernels configured
with 16KB or 64KB pages. Hardcoding 4KB in these hybrid GKI
environments causes SIGTRAP crashes when decommitting memory with
MAP_FIXED. Dynamic lookup prevents these crashes and improves
compatibility with modern TV hardware.

Bug: 527944046

---

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[gemini-code-assist]

Code Review

This pull request updates page_allocator_constants.h to enable dynamic page size lookup for all Android architectures, including 32-bit userspace. This change prevents SIGTRAP crashes when decommitting memory with MAP_FIXED on hybrid GKI TV environments configured with 16KB/64KB pages. There are no review comments, and I have no feedback to provide.